I'm pretty sure this is the case.
tracert pop.mail.yahoo.co.uk
Tracing route to pop1.mail.vip.ukl.yahoo.com [217.146.176.233]
over a maximum of 30 hops:
1 1 ms 1 ms 1 ms *
2 143 ms 14 ms 18 ms *
3 202 ms 49 ms 12 ms 81.212.75.5
4 12 ms 12 ms 11 ms 81.212.212.1
5 * * 11 ms izm_t1_2-izmir_t2_2.turktelekom.com.tr [212.156.120.17]
6 * * * Request timed out.
7 * * * Request timed out.
8 * * * Request timed out.
9 * * * Request timed out.
10 ^C